symbolics/switch_todo

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TODO list for symbolics backend switch to pynac

default symbolics -> pynac patch

• sqrt, etc. convert to SR
• matrix class for SR

• default x is SymbolicVariable

• function()
• clear_vars()

• sage/calculus/functional.py stuff expects SymbolicExpressions

• CallableSymbolicExpressionRing check=True ?

• variable name is not a valid Python identifier!

  sage/calculus/calculus.py :6391,6395

no support in sage.symbolics.expression

• no .polynomial() Trac ticket #5763 by Nick Alexander

  • number field creation doesn't handle pynac expressions?

  sage/rings/number_field/number_field_rel.py
  sage/rings/number_field/number_field.py
  sage/rings/polynomial/multi_polynomial_element.py
  sage/rings/polynomial/polynomial_singular_interface.py
  sage/rings/polynomial/multi_polynomial_libsingular.pyx

• no .roots() method

  sage/rings/polynomial/polynomial_element.pyx :3691

• no .gradient() method

  sage/modules/free_module_element.pyx :1953

• .derivative() without explicit variable

  sage/calculus/functions.py :37,43,52,56,60,64

• call with unnamed arguments

  sage/ext/fast_eval.pyx
  sage/ext/fast_callable.pyx
  sage/gsl/integration.pyx :163
  sage/numerical/optimize.py :199,316,320,483
  lots in sage/plot

• no ._fast_callable_()

  sage/ext/fast_callable.pyx

• no ._fast_float_()

  sage/numerical/optimize.py :473

• no .limit()

  sage/interfaces/maxima.py :426

• no support for .integrate()

  sage/interfaces/maxima.py :588,594,598,604

• no support for .assume() or .forget()

  should sage.symbolic.expression.Expression have methods called .assume() and .forget()?

  sage/interfaces/maxima.py :593,603

• no support for .nintegral()

  sage/gsl/integration.pyx :161

• no simplify:

  • .simplify()

  • .simplify_log()

  • .simplify_trig()

  • .simplify_exp()

  • .simplify_radical()

  • .simplify_full()

  • .simplify_rational()

  • and the aliases

• no pretty printing (.display2d())

• no .real() (deprecate, and refer to .real_part()?)

• no .imag() (deprecate, and refer to .imag_part()?)

• __float__ ???

  sage/calculus/wester.py :400,401,409

• no .taylor() (.series()?)

  sage/calculus/wester.py :593

• no .power_series()

  sage/calculus/wester.py :594

• no .hessian()

  sage/calculus/functions.py :117

• no .solve()

• .variables() should return tuple

• no .find_root()

• no ._sympy_()

• no .laplace()

• no .inverse_laplace()

• no .partial_fraction() (deprecate and rename to .partial_fraction_decomposition()?)

• no .number_of_arguments() (there is .nargs())

• no ._maxima_init()

• no ._mathematica_init()

others

sage/rings/power_series_ring.py sage/rings/arith.py

• coercion?

sage/rings/polynomial/multi_polynomial_ring.py :270

• possible bug in pynac

sage/rings/polynomial/polynomial_ring.py

• I, sqrt(2), etc.

sage/rings/polynomial/polynomial_element.pyx

• ???

sage/schemes/elliptic_curves/constructor.py

• desolve expects old symbolics objects

sage/structure/coerce_maps.pyx

• callable symbolic expression .derivative() tried to be intelligent

  sage/modules/free_module_element.pyx :1961

• maxima matrices don't play well

  sage/matrix/matrix_symbolic_dense.pyx
  sage/calculus/tests.py

sage/interfaces/qepcad.py

sage/gsl/integration.pyx